Sub-standard work and overcharging by some garages and franchised dealers are common according to the Trading Standards Agency.

Complaints about servicing and repairs rank as the fifteenth most common call to the TSA. Charging for parts not fitted, replacing parts not required and carrying out work not requested are common complaints.

Charging for the best engine oil and using the cheapest, some garages syphon the old oil from the engine rather than draining through the sump, it’s easier. Then they put new oil in to the dirty engine - a pointless exercise. And who’s to know?

Mail order specialist carparts-direct.co.uk has a new online service to help motorists carry out their own engine service and avoid becoming a victim. Customers can use their ‘Ask the Expert’ service to enquire on the website for the best solution to carry out what is claimed to be the ‘Ultimate D.I.Y Engine Service’

You can enquire online and you’ll receive an email tailored just for your model of vehicle. The expert recommends how to improve performance, economy and reliability of your engine. The information includes common faults, fitting tips and how long the job is likely to take. A check list is included and a discounted price is offered for the Do-It-Yourself Engine Service Kit - without any obligation buy.

Mark Cornwall of carparts-direct.co.uk said, "Our customers often order products from us and take them to a friend or garage to fit. However, servicing an engine can be simple, our customers can save a small fortune and do a better job with the help of our ‘Ask the Expert’ service. An engine service on most cars will take about an hour. It’s rarely difficult. We even have the books to show how."

UK garage labour rates are now the highest in Europe. Most Audi, BMW and Mercedes dealerships charge well over a hundred pounds an hour. An engine service can cost well over £500. Carparts-direct.co.uk claims its complete ‘Ultimate D.I.Y Engine Service Kit’ which includes extra items not used by a garage costs less than a £100 for most vehicles.